could suggest
Regular verb: suggest - suggested- suggested

Affirmation 	
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I could suggest
you could suggest
he could suggest
we could suggest
you could suggest
they could suggest 	I could be suggesting
you could be suggesting
he could be suggesting
we could be suggesting
you could be suggesting
they could be suggesting	I could have suggested
you could have suggested
he could have suggested
we could have suggested
you could have suggested
they could have suggested	I could have been suggesting
you could have been suggesting
he could have been suggesting
we could have been suggesting
you could have been suggesting
they could have been suggesting	

Negation 	
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I could not suggest
you could not suggest
he could not suggest
we could not suggest
you could not suggest
they could not suggest 	I could not be suggesting
you could not be suggesting
he could not be suggesting
we could not be suggesting
you could not be suggesting
they could not be suggesting	I could not have suggested
you could not have suggested
he could not have suggested
we could not have suggested
you could not have suggested
they could not have suggested	I could not have been suggesting
you could not have been suggesting
he could not have been suggesting
we could not have been suggesting
you could not have been suggesting
they could not have been suggesting	

Interrogative form 	
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could I suggest?
could you suggest?
could he suggest?
could we suggest?
could you suggest?
could they suggest? 	could I be suggesting?
could you be suggesting?
could he be suggesting?
could we be suggesting?
could you be suggesting?
could they be suggesting? 	could I have suggested?
could you have suggested?
could he have suggested?
could we have suggested?
could you have suggested?
could they have suggested? 	could I have been suggesting?
could you have been suggesting?
could he have been suggesting?
could we have been suggesting?
could you have been suggesting?
could they have been suggesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not suggest?
could you not suggest?
could he not suggest?
could we not suggest?
could you not suggest?
could they not suggest? 	could I not be suggesting?
could you not be suggesting?
could he not be suggesting?
could we not be suggesting?
could you not be suggesting?
could they not be suggesting? 	could I not have suggested?
could you not have suggested?
could he not have suggested?
could we not have suggested?
could you not have suggested?
could they not have suggested? 	could I not have been suggesting?
could you not have been suggesting?
could he not have been suggesting?
could we not have been suggesting?
could you not have been suggesting?
could they not have been suggesting?